The Bloch point 3D topological charge induced by the magnetostatic interaction

Abstract A hedgehog or Bloch point is a point-like 3D magnetization configuration in a ferromagnet. Regardless of widely spread treatment of a Bloch point as a topological defect, its 3D topological charge has never been calculated. Here, applying the concepts of the emergent magnetic field and Dira...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	F. Tejo, R. Hernández Heredero, O. Chubykalo-Fesenko, K. Y. Guslienko
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/495b25e7ff24403ba7d05228c264d13f
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:495b25e7ff24403ba7d05228c264d13f
record_format	dspace
spelling	oai:doaj.org-article:495b25e7ff24403ba7d05228c264d13f2021-11-08T10:53:11ZThe Bloch point 3D topological charge induced by the magnetostatic interaction10.1038/s41598-021-01175-92045-2322https://doaj.org/article/495b25e7ff24403ba7d05228c264d13f2021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01175-9https://doaj.org/toc/2045-2322Abstract A hedgehog or Bloch point is a point-like 3D magnetization configuration in a ferromagnet. Regardless of widely spread treatment of a Bloch point as a topological defect, its 3D topological charge has never been calculated. Here, applying the concepts of the emergent magnetic field and Dirac string, we calculate the 3D topological charge (Hopf index) of a Bloch point and show that due to the magnetostatic energy contribution it has a finite, non-integer value. Thus, Bloch points form a new class of hopfions—3D topological magnetization configurations. The calculated Bloch point non-zero gyrovector leads to important dynamical consequences such as the appearance of topological Hall effect.F. TejoR. Hernández HerederoO. Chubykalo-FesenkoK. Y. GuslienkoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q F. Tejo R. Hernández Heredero O. Chubykalo-Fesenko K. Y. Guslienko The Bloch point 3D topological charge induced by the magnetostatic interaction
description	Abstract A hedgehog or Bloch point is a point-like 3D magnetization configuration in a ferromagnet. Regardless of widely spread treatment of a Bloch point as a topological defect, its 3D topological charge has never been calculated. Here, applying the concepts of the emergent magnetic field and Dirac string, we calculate the 3D topological charge (Hopf index) of a Bloch point and show that due to the magnetostatic energy contribution it has a finite, non-integer value. Thus, Bloch points form a new class of hopfions—3D topological magnetization configurations. The calculated Bloch point non-zero gyrovector leads to important dynamical consequences such as the appearance of topological Hall effect.
format	article
author	F. Tejo R. Hernández Heredero O. Chubykalo-Fesenko K. Y. Guslienko
author_facet	F. Tejo R. Hernández Heredero O. Chubykalo-Fesenko K. Y. Guslienko
author_sort	F. Tejo
title	The Bloch point 3D topological charge induced by the magnetostatic interaction
title_short	The Bloch point 3D topological charge induced by the magnetostatic interaction
title_full	The Bloch point 3D topological charge induced by the magnetostatic interaction
title_fullStr	The Bloch point 3D topological charge induced by the magnetostatic interaction
title_full_unstemmed	The Bloch point 3D topological charge induced by the magnetostatic interaction
title_sort	bloch point 3d topological charge induced by the magnetostatic interaction
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/495b25e7ff24403ba7d05228c264d13f
work_keys_str_mv	AT ftejo theblochpoint3dtopologicalchargeinducedbythemagnetostaticinteraction AT rhernandezheredero theblochpoint3dtopologicalchargeinducedbythemagnetostaticinteraction AT ochubykalofesenko theblochpoint3dtopologicalchargeinducedbythemagnetostaticinteraction AT kyguslienko theblochpoint3dtopologicalchargeinducedbythemagnetostaticinteraction AT ftejo blochpoint3dtopologicalchargeinducedbythemagnetostaticinteraction AT rhernandezheredero blochpoint3dtopologicalchargeinducedbythemagnetostaticinteraction AT ochubykalofesenko blochpoint3dtopologicalchargeinducedbythemagnetostaticinteraction AT kyguslienko blochpoint3dtopologicalchargeinducedbythemagnetostaticinteraction
_version_	1718442520183046144

The Bloch point 3D topological charge induced by the magnetostatic interaction

Ejemplares similares